SOLUTION: Why is -16x^2-64=0 not a calculator problem?

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Question 596394: Why is -16x^2-64=0 not a calculator problem?
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
Because you can easily solve it without a calculator.

-16x^2 = 64

x^2 = -4

x = 2i, -2i